Brake shoe



Patented July 21, 1936 PATENT orrica BRAKE snon Adolph Rosner, SouthBend, Ind., assignor to Bendix Brake-Company, South Bend, Ind., a

I corporation oi Illinois Application April 21, 1930, Serial No. 445,870

This invention relates to internal brakes and more particularly to thebraking element thereof.

An object of the invention is to provide a fricexpanding tion elementpossessing great strength and riformed and secured by one edge thereofto the Still a further object of the invention is to provide a methodfor the manufacture of a friction element for a brake, wherein thereinforcing web of the element may be stamped from sheet materialcrimped or corrugated and deformed to the radius of the rim of theelement.

Other objects of the invention will appear from the followingdescription taken in connection with the drawing, which forms a part ofthis specification, and in which:

Figure 1 is a side elevation of a brake shoe embodying the invention;

Figure 2 is a plan view of the back of the shoe;

Figure 3 is a plan view of a stamping from which the web is formedhaving reinforcing plates secured to its respective ends;

Figure 4 is a sectional view of the stamping shown in Figure 3 after ithas been crimped or corrugated;

' Figure 5 is a sectional view of arim and the strengthening web afterthey have been formed;

Figure 6 is a similar view illustrating the rim and web welded together;and

Figure 7 is a sectional view substantially on line 1-1, Figure 3,illustrating the reinforcing clip for the anchor portions of the shoe.

Referring to the drawing for more specific details of the invention, Illrepresents g nerally a friction element or a shoe for an internaiexpanding brake. Asshown, the shoe comprises a rim Ii having securedthereto a suitable lining l2. The rim is reinforced by a corrugated webI3 having positioned on its respective ends reinforcing clips l4apertured as indicated at l5 and Hi to receive an anchor and anarticulating connection not shown.

The web i3 is stamped from sheet metal first in the form of a blank IT.This blank has suit ably secured to its respective ends as by spotwelding the reinforcing members l4.,

friction or connection with certain specific embodiments, the

- same plane and apertured,,reinforcing plates bent Thesemembers arepreferably made ofsheet metal bent 2 Claims. (Cl. 188-250) uponthemselves as shown in Figure 'l to fit snugly on the ends of the blankH. The reinforcing members I together with theends of the blank areapertured asat l5 and 16 for the purpose hereinbefore specified. Theblank is then corru- 5 gated substantially as shown in Figure 4.

Assuming that the rim H has been previously bent or formed to thedesired arc, the web is then deformed to the radius of the rimsubstantially in the form shown in Figure 5. In deforming the web to theradius of the rim that portion lying immediately adjacent to the innerperiphery-of the rim will be extended or stretched to a greater or lessdegree, whereas that edge farthest from the inner periphery of the rimwill be compressed. Hence, the corrugations of the web will becontractedin pitch at the inner periphery of the web and expanded at theopposite edge. This produces a'web having a tapering cross section.

This is due to stretching that portion of the 20 web adapted to engagethe rim and compressing that portion or edge of the web farthest removedfrom the rim. Upon deforming the blank I! to conform to the rim, ittakes the shape illustrated in Figure 5, after which it is spot weldedto the rim, as indicated at It.

A friction member or shoe provided with a web of this characterpossesses great strength and rigidity and that by virtue of theparticular form ofweb, the friction member or shoe as a whole may bemanufacturedfrom comparatively light sheet metal, accordingly greatsaving in the cost of production is effected.

Although this invention has been described in fore, to be limited onlyas indicated by the scope of the appended claims. The method of manu- 40facture described above is claimed in my divisional application No.634,040, filed September 20, 1932.

Having thus described the various features of the invention, what Iclaim is new and desire to secure by Letters Patent is:

1. A friction member comprising'a rim, a lining secured to the rim, acorrugated web secured to the rim and plates bent upon themselves andfitted on the respective ends of the web.

2. A friction element comprising a rim, a lining secured to the rim, areinforcing corrugated web spot welded to the rim, the respective endsof the reinforcing web being positioned in the upon themselves toembrace the respective ends of the web, the reinforcing plates havingapertures coinciding with the apertures in the respective ends of theweb.

ADOLPH Rosana.

July 21, 1936. c. G. SALMON 2,048,469

OPHTHALMIC MOUNTING Filed May 28, 1935 CHESTER G. SALMON INVENTOR

